CVE-2015-6835
Summary
| CVE | CVE-2015-6835 |
|---|---|
| State | PUBLISHED |
| Assigner | microfocus |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-05-16 10:59:19 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| Description | The session deserializer in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 mishandles multiple php_var_unserialize calls, which allow remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted session content. |
Risk And Classification
Primary CVSS: v3.0 9.8 CRITICAL from [email protected]
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Problem Types: NVD-CWE-Other | n/a
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 9.8 | CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 2.0 | [email protected] | Primary | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
PartialIntegrity
PartialAvailability
PartialAV:N/AC:L/Au:N/C:P/I:P/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Php | Php | 5.5.0 | All | All | All |
| Application | Php | Php | 5.5.0 | alpha1 | All | All |
| Application | Php | Php | 5.5.0 | alpha2 | All | All |
| Application | Php | Php | 5.5.0 | alpha3 | All | All |
| Application | Php | Php | 5.5.0 | alpha4 | All | All |
| Application | Php | Php | 5.5.0 | alpha5 | All | All |
| Application | Php | Php | 5.5.0 | alpha6 | All | All |
| Application | Php | Php | 5.5.0 | beta1 | All | All |
| Application | Php | Php | 5.5.0 | beta2 | All | All |
| Application | Php | Php | 5.5.0 | beta3 | All | All |
| Application | Php | Php | 5.5.0 | beta4 | All | All |
| Application | Php | Php | 5.5.0 | rc1 | All | All |
| Application | Php | Php | 5.5.0 | rc2 | All | All |
| Application | Php | Php | 5.5.1 | All | All | All |
| Application | Php | Php | 5.5.10 | All | All | All |
| Application | Php | Php | 5.5.11 | All | All | All |
| Application | Php | Php | 5.5.12 | All | All | All |
| Application | Php | Php | 5.5.13 | All | All | All |
| Application | Php | Php | 5.5.14 | All | All | All |
| Application | Php | Php | 5.5.15 | All | All | All |
| Application | Php | Php | 5.5.16 | All | All | All |
| Application | Php | Php | 5.5.17 | All | All | All |
| Application | Php | Php | 5.5.18 | All | All | All |
| Application | Php | Php | 5.5.19 | All | All | All |
| Application | Php | Php | 5.5.2 | All | All | All |
| Application | Php | Php | 5.5.20 | All | All | All |
| Application | Php | Php | 5.5.21 | All | All | All |
| Application | Php | Php | 5.5.22 | All | All | All |
| Application | Php | Php | 5.5.23 | All | All | All |
| Application | Php | Php | 5.5.24 | All | All | All |
| Application | Php | Php | 5.5.25 | All | All | All |
| Application | Php | Php | 5.5.26 | All | All | All |
| Application | Php | Php | 5.5.27 | All | All | All |
| Application | Php | Php | 5.5.28 | All | All | All |
| Application | Php | Php | 5.5.3 | All | All | All |
| Application | Php | Php | 5.5.4 | All | All | All |
| Application | Php | Php | 5.5.5 | All | All | All |
| Application | Php | Php | 5.5.6 | All | All | All |
| Application | Php | Php | 5.5.7 | All | All | All |
| Application | Php | Php | 5.5.8 | All | All | All |
| Application | Php | Php | 5.5.9 | All | All | All |
| Application | Php | Php | 5.6.0 | alpha1 | All | All |
| Application | Php | Php | 5.6.0 | alpha2 | All | All |
| Application | Php | Php | 5.6.0 | alpha3 | All | All |
| Application | Php | Php | 5.6.0 | alpha4 | All | All |
| Application | Php | Php | 5.6.0 | alpha5 | All | All |
| Application | Php | Php | 5.6.0 | beta1 | All | All |
| Application | Php | Php | 5.6.0 | beta2 | All | All |
| Application | Php | Php | 5.6.0 | beta3 | All | All |
| Application | Php | Php | 5.6.0 | beta4 | All | All |
| Application | Php | Php | 5.6.1 | All | All | All |
| Application | Php | Php | 5.6.10 | All | All | All |
| Application | Php | Php | 5.6.11 | All | All | All |
| Application | Php | Php | 5.6.12 | All | All | All |
| Application | Php | Php | 5.6.2 | All | All | All |
| Application | Php | Php | 5.6.3 | All | All | All |
| Application | Php | Php | 5.6.4 | All | All | All |
| Application | Php | Php | 5.6.5 | All | All | All |
| Application | Php | Php | 5.6.6 | All | All | All |
| Application | Php | Php | 5.6.7 | All | All | All |
| Application | Php | Php | 5.6.8 | All | All | All |
| Application | Php | Php | 5.6.9 | All | All | All |
| Application | Php | Php | All | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| PHP: Multiple vulnerabilities (GLSA 201606-10) — Gentoo security | af854a3a-2127-422b-91ae-364da2661108 | security.gentoo.org | |
| PHP Multiple Bugs Let Remote Users Obtain Potentially Sensitive Information, View Files, and Execute Arbitrary Code - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| PHP 'php_var_unserialize()' Function Use After Free Remote Code Execution Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| Debian -- Security Information -- DSA-3358-1 php5 | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | |
| PHP :: Sec Bug #70219 :: Use after free vulnerability in session deserializer | af854a3a-2127-422b-91ae-364da2661108 | bugs.php.net | |
| PHP: PHP 5 ChangeLog | af854a3a-2127-422b-91ae-364da2661108 | php.net | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.